Rack



FIG. 1 is a front elevational view of a rack according to our new and ornamental design,

FIG. 2 is a rear elevational view thereof,

FIG. 3 is a right side elevational view thereof,

FIG. 4 is a left side elevational view thereof,

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a rack, as shown and described. 